Twenty One Pilots is flying high on popularity of their fourth album - Blurryface. Originally a trio formed in 2009, the American duo now consists of Tyler Joseph, the founder, and Josh Dun, the drummer. Both musicians grew up in conservative homes, under strict parenting. Hong Kong parents, however, should learn from Joseph's dad, who was a high school principal. When the young Joseph asked his dad whether he was letting his parents down by neither attending college nor earning a lot of money, he replied, "It's not about how much money you make or what your job is, but it's more about your character. For that, I'm proud of you." Dun, similarly, was banned from non-Christian music. He taught himself playing drums, and sought tips secretly from a music store to improve his skills.